# Relationship history for MSHA mine 3401182

Current hierarchy: **Nowata County-OK → Nowata County → NOWATA PITS DIST #3**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Miami Ready Mix → NOWATA PITS DIST #3; 1979-01-01 to 2000-12-03; source msha-controller-operator-history
- **controller_controls_mine:** Miami Ready Mix → NOWATA PITS DIST #3; 1979-01-01 to 2000-12-03; source msha-controller-operator-history
- **controller_controls_operator:** Miami Ready Mix → Miami Ready Mix; 1979-01-01 to 2000-12-03; source msha-controller-operator-history
- **operator_operates_mine:** Nowata County → NOWATA PITS DIST #3; 2000-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nowata County-OK → NOWATA PITS DIST #3; 2000-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nowata County-OK → Nowata County; 2000-12-04 to current/open; source msha-controller-operator-history